* {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: Arial, sans-serif;
      background-color: #f5f5f5;
    }

    /* Top Header */
    .topHeader {
      background-color: #6a1b9a;
      color: white;
      text-align: right;
      padding: 5px 20px;
    }
    .topHeader a {
      color: white;
      margin-left: 15px;
      text-decoration: none;
    }

    /* Navigation */
    .navigation {
      background-color: #2e7d32;
      padding: 10px;
    }
    .navigation ul {
      list-style: none;
      display: flex;
      gap: 20px;
    }
    .navigation li {
      color: white;
      cursor: pointer;
    }

    /* Header */
    .header {
      display: flex;
      align-items: center;
      background-color: #c62828;
      padding: 15px;
    }
    .header img.logo {
      width: 80px;
      height: auto;
      margin-right: 20px;
      
    }
    .header img.banner {
      flex: 1;
      height: 250px;
      background: #ef9a9a;
      
    }

    /* Layout main */
    .main {
      display: flex;
      margin: 20px;
    }

    /* Sidebar */
    .sidebar {
      width: 25%;
      background-color: #b3e5fc;
      padding: 15px;
      box-shadow: 2px 2px 5px rgba(0,0,0,0.2);
    }
    .sidebar ul {
      list-style: none;
    }
    .sidebar li {
      margin-bottom: 10px;
    }

    /* Content Area */
    .content {
      flex: 1;
      background-color: #90caf9;
      padding: 15px;
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
      gap: 15px;
    }
    .item {
      background: white;
      border: 1px solid #ccc;
      padding: 10px;
      box-shadow: 2px 2px 5px rgba(0,0,0,0.1);
      text-align: center;
      transition: all 0.3s ease;
    }
    .item:hover {
      transform: scale(1.05) ;
      filter: drop-shadow(5px 5px 10px gray);
    }

    /* Footer */
    .footer {
      background-color: #6a1b9a;
      color: white;
      text-align: center;
      padding: 10px;
      margin-top: 20px;
    }